JAPAN ATOMIC INDUSTRIAL FORUM, INC.

for Japanese

ATOMS in JAPAN

1 February, 2019

JAEA Achieves 150 Hours of Continuous Hydrogen Production Toward Utilization of Heat from HTGRs

On January 25, the Japan Atomic Energy Agency (JAEA) announced that it had succeeded in producing hydrogen continuously for 150 hours using a thermal-chemical iodine-sulfur (IS) process that JAEA developed to more efficiently utilize the heat supply capabilities of high-temperature gas-cooled reactors (HTGRs).  

JAIF President Takahashi visited HTTR reactor building (April 2018)

The thermochemical IS process combines three reactions using iodine (I) and sulfur (S) – sulfate degradation, a Bunsen reaction, and hydrogen iodide decomposition. It produces hydrogen by splitting water (an abundant resource) into H2 and O2 using heat generated without CO2 emissions. Moreover, the iodine and sulfur are circulated within the system, emitting no waste to the outside environment.

At the same time, given that extremely corrosive liquids such as sulfuric acid are used at high temperatures, for commercial use, it was necessary to develop technology for manufacturing equipment/facilities to identify materials suitable for different conditions and to validate their reliability. JAEA successfully developed durable reactor vessels for each reaction process.

Three years ago, in 2016, JAEA succeeded in in test-producing hydrogen, making about ten liters per hour for eight hours. After further development of elemental technology toward more stable production of hydrogen, JAEA has now succeeded in continuous production of hydrogen for 150 hours (at about 30 liters/hour), a milestone in long-duration operation.

[clizk to zoom] Mechanism of IS processes (quoted from materials released by the Ministry of Education, Culture, Sports, Science and Technology (MEXT))

 

 

 

 

 

 

JAEA will continue to accumulate operational data and carry out R&D toward practical use of the system to produce large amounts of hydrogen in a stable manner, including automatic operations control. It aims next at a demonstration of hydrogen production using the High-Temperature Engineering Test Reactor (HTTR). HTTR is now ALSO undergoing a safety compatibility examination under the new regulatory standards by the Nuclear Regulation Authority (NRA).

 

 

 

Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

SNS facebooktwitter

NPPs Map

Video

“The current situation at Fukushima Daiichi NPS” -From 3.11 toward the future- (ver, July 2019)

8 July, 2019
“The current situation at Fukushima Daiichi NPS” -From 3.11 toward the future- (ver, July 2019)09:17

Recent News

29 November, 2019
NRA Issues Draft Review Report: Onagawa-2 Meets New Regulatory Standards
28 November, 2019
RIKEN Unveils Transportable Compact Neutron Source System
27 November, 2019
JAIF Releases Results of Fact-Finding Survey of Japanese Nuclear Industry for Fiscal 2018
26 November, 2019
Hitachi Receives Order from Mayo Clinic to Build First Carbon Ion Treatment System in North America
25 November, 2019
Keidanren: Japan’s Commitment to Low-Carbon Society Shows NPP Restarts Helped Reduce CO2 Emissions in Fiscal 2018
21 November, 2019
TEPCO Announces Timeline for Storage and Disposal of Treated Contaminated Water at Fukushima Daiichi
15 November, 2019
JAEA Holds Public Meeting, Discusses Future Vision, Fukushima Reconstruction and Revitalization
15 November, 2019
IAEA/RCA Symposium: Cooperating with Developing Countries Through Nuclear Science and Technology
8 November, 2019
EU to Ease Restrictions on Japanese Food Imports, Though Chief Cabinet Secretary Suga Asserts Japan Will Work Toward Their Full Elimination
28 October, 2019
OCCTO’s Electricity Supply and Outlook for Winter Sees Capacity Reserve Margin of 3 Percent Nationwide
▲TOP